#!/bin/sh

apply_settings() {
    sleep 2
    xinput set-prop pointer:"Logitech USB Trackball" "libinput Accel Speed" 1.000000
    xinput set-prop pointer:"SteelSeries SteelSeries Rival 310 eSports Mouse" "libinput Accel Speed" 0.300000
    [ -f ~/.Xmodmap ] && xmodmap ~/.Xmodmap
}

apply_settings

while true; do
    state=$(lsusb)
    sleep 2
    [ "$state" != "$(lsusb)" ] && apply_settings
done